No Master IDE Detected

Greetings,
I'm a new poster. I am receiving the same error, and must press F1 every time I reboot. I just built my machine. I have a CD-RW and DVD-ROM on the IDE cable. I have a SATA drive attached to the mobo too. My board is an ASUS M2N-VM DVI. Since I don't even have a drive attached to IDE, I'm not sure why it's alerting me to this every time I boot.